

\magnification = 2200 %\magstep3

\def\UseTimesRoman{
\font\cmr=Times
\font\TR=Times at 10pt
\font\TRXII=Times at 12pt
\font\TRXIV=Times at 14pt
\font\TRXX=Times at 20pt
\font\TRXXIV=Times at 24pt
\font\TI=TimesI at 10pt     %Times Italic
\font\TB=TimesB at 10pt     %Times Bold
\font\TBI=TimesBI at 10pt   %Times Bold Italic
\font\TBIviii=TimesBI at 8pt 
\font\TBIv=TimesBI at 5pt 
%\font\TO=TimesO at 10pt  %Times Oblique (Times Roman, slanted 22% with EdMetrics)
\font\TO=TimesI at 10pt  %Times Oblique (Times Roman, slanted 22% with EdMetrics)

\font\TIVIII=TimesI at 8pt
\font\TRVIII=Times at 8pt 
\font\TIVI=TimesI at 6pt
\font\TRVI=Times at 6pt 

	     \font\tenrmscld=Times at 10 pt
      \font\sevenrmscld=Times at 7 pt
      \font\fivermscld=Times at 5 pt

      \font\teniscld=cmmi10 at 10.3 pt
      \font\seveniscld=cmmi10 at 7.21 pt
      \font\fiveiscld=cmmi10 at 5.15 pt     
      \font\tensyscld=cmsy10 at 10.3 pt
      \font\sevensyscld=cmsy10 at 7.21 pt   
      \font\fivesyscld=cmsy10 at 5.15 pt    
      \font\tenexscld=cmex10 at 10.3 pt
      \font\tenbfscld=cmbx10 at 10.3 pt
      \font\sevenbfscld=cmbx10 at 7.21 pt    
      \font\fivebfscld=cmbx10 at 5.15 pt  

\font\Courier = Courier
\font\Symbol = Symbol

\def\Omega{\hbox{{\Symbol W}}}

\textfont0=\tenrmscld \scriptfont0=\sevenrmscld\scriptscriptfont0=\fivermscld
\def\rm{\fam0\tenrmscld}
\textfont1=\teniscld \scriptfont1=\seveniscld \scriptscriptfont1=\fiveiscld
\def\mit{\fam1} \def\oldstyle{\fam1\teni}
\textfont2=\tensyscld \scriptfont2=\sevensyscld \scriptscriptfont2=\fivesyscld
\def\cal{\fam2}
\textfont3=\tenexscld \scriptfont3=\tenexscld \scriptscriptfont3=\tenexscld
\def\it{\TI} 
\def\sl{\TO} 
\def\bf{\TB} 
\def\rm{\TR}
%\def\tt{\ttCourier}
\def\tt{\Courier}
\def\abstractfont{\TRVIII}
\def\footnotefont{\TRVIII}
\def\tinyfont{\TRvi}
\def\smalltitlefont{\TRXII}
\def\titlefont{\TRXIV}
\def\bigtitlefont{\TRXX}
\def\verybigtitlefont{\TRXXIV}
\textfont9=\TBI \scriptfont9=\TBIviii \scriptscriptfont9=\TBIv
\def\mbi{\fam9}
\rm
}  

%\UseTimesRoman

\hsize 7 true in 
\vsize 9 true in
\hoffset = -0.20 true in 
\voffset -0.25 true in
\parskip=3pt



\input amssym.def            % small letters for UNIX,  not: AMSsym.def

\def\lf{\ \hfil\break}       % Neue Zeile ohne Einr"ucken, 'linefeed'
\def\cl{\centerline}
\def\LF{\medskip\noindent}   % Neue Zeile mit breiterem Zwischenraum


\nopagenumbers


\cl{\bf The Sound Category}

\bigskip

   While all the other 3D-XplorMath categories are concerned with the visualization 
 of mathematics---and so make use of your eyes and sense of sight, in this one you will 
 be using your ears and your sense of hearing. For this reason it is important that 
 while working with this category your computer should be attached to a reasonably 
 high fidelity sound system---either headphones or stereo loudspeakers (preferably with
 a subwoofer).
 
 \noindent
   So far the only exhibit in the Sound Category is the Shepard Tones. For an 
 explanation of this exhibit, select About This Object after selecting Shepard Tones 
 from the Sound menu.


    
\bye